Search Kids Discover

Knuckle Noises

  • September 2, 2012
  • By KIDS DISCOVER

Ever wonder why you hear a popping sound when you crack your knuckles? It’s because a gas bubble moves into the joint cavity and then bursts. Contrary to popular belief, research hasn’t shown that knuckle-cracking causes arthritis, but it could eventually weaken your grip.

About the author

Kids Discover For over 25 years, we’ve been creating beautifully crafted nonfiction products for kids. With a specialty in science and social studies, our team of talented writers, award-winning designers and illustrators, and subject-experts from leading institutions is committed to a single mission: to get children excited about reading and learning.